Automatic pressure valve



J. G. HARRIS ET AL AUTOMATIC PRESSURE VALVE July 3 Filed April 18,

aml,

' To all. whom it mag concern.

Fatented July 3, 1923.

f time.

AUTOMATIC PRESSURE VALVE.

Application filed April 18, 1922;] Serial No. 654,945.".

. Be it known that we, JOSEPH G. HARRIS and GEORGE D. JAQUETT, citizensof the United States, residing at Jacksonville, in the county of Duvaland State of Florida,

have invented certain new and useful Imf provements in AutomaticPressure Valves, of which the following is a specification.-

more particularly to devices of this characv terfor automaticallyshutting off the intake passage'of gas or the like inievent of thepressure belng reduced below a certain predetermined or safe degree,orof the gas ceasing forcany reason to flow, to prevent:-

the escape of gas when the pressure is restored.

Another object of the'invention is to provide a device of thischaracterincluding a pressure influenced diaphragm' and a gascontrolling valve, and means whereby the gas controlling valve anddiaphragm are operatively associated.

With these and otherobjects in view the invention consists in certainnovel features ofconstruotion as hereinafter shown and described andthen specifically pointed out in the claim, and in the drawingsillustrative of the preferred embodiment of the invention: 1

Figure 1 is a vertical section.

Fig. 2 is a plan view with the closure and diaphragm detached.

An automatic shut-off valve in accordance with this invention, comprisesa flanged shell or casing 10, to which is attached at one side an intake11, and to which is attached at its opposite side an outlet 12.

Integral with, and arranged within the shell 10, as well as being ofless height than the height of the shell 10, is a partition 13,

which divides the shell or casing 10 into .three chambers, one of whichis an inlet,"

chamber 14 into which opens the intakell, another is an outlet chamber15 with which communicates the outlet 12, and the other of which is adiaphragm chamber 15, ar-

ranged over the inlet and outlet chambers and permanently '11'1- openedcommunlcatlon with the outlet chamber 15. Communication between thediaphragm chamber and Arrangedwithin the upper portion of thechamber-'14, as well as secured to;the wall tivcly soft metal and whichhas; its lower edge bevelled to providea 'va-lveseat 17,

withwhich cooperates a valve 25, for I the purpose of controllingcom1nun1cat1on be- Th1s1nven't1on relates to shut off valves, I

jJosEPH e. HARRIS Annenonen D'." eeunrr',. oraac sonvinnn;rnoiirna.

of the lfllilLBl,lS a verticallydisposedihollow I cylindrical'member 17constructed of-rela-i.

tween thelinta'ke chamber andwth'c diak phragni chamber-16.

shell or casing l0,'-.is aflanged closure 19,

andvwith 'thetfiange, thereof opposing'tl'ie-li. flange'of theishell orcasing 10. Extending,

tween the fiangesLof-the shell. and cover is;

across the. chamber 16, and interposed he' a diaphragm 20,01.relativelyxthin metali The diaphragm 20, is-secured to theicov'er andshell by hold-fast devices,18 wl1icl1 ex tend" through the? flangesofthe coverand shell, as well as throughthe diaphragm 20,

and the said hold-fast devices 18', further provide means fordetachably.connecting theflcover to the shell. The diaphragm 2Q isadapted to be expanded by the pressure of gas against itslower face. p

Secured in the top of the member 17,

projecting thereabove and having its'upper end offset outwardly withrespect to the j member 17 is a su ortin element 21 to pp 9; a

which is eocentricallypivoted through the medium ofthe pivot pin 22, alever 23,

That

which extends overthe member 17. end of the lever 23, which extendsover-the member 17' has pivotally connected therewith, as at 27, adependingvalve stem 26, i

which carries on its lower end the valve 25.

lever 23, 1s;

Carried by the'otherend ofthe a counter-weight 24.

Extending through the closure 19 and the diaphragm20 is a'push rod28having a push ,f

button 29 at the upper end externally-of the closure. The rod 28 ispivot d a its lower end to the lever 23 between the pivot 22 and theweight2 l, as at 30, andisprovided with clamp'nuts 31' and 32 where it"-passes through the diaphragm for securing it to the latter.

By this means the rod 28, diapliragin2Q and lever 23 are coupled tooperate in unison as will be obvious. i 4

Initially therod 28 open the valve 25 and permit thegas to will beelevated to I open and the burners lighted so long as thegas-pressurecontinues.

If the flow of the gas ceases from any cause, and thus automaticallyextinguishes the burners, the reduction of pressure will cause thediaphragmto collapse and-release the weight 24 and permit the latter todepressthe.longer end oif, the lever. 23 and elevate the shorter end andclose the valve and hold it closed. I

When the flow of gas is resumed; it'will not pass to the extinguishedburners-until the valve is opened by pressure applied manually to therod 28-, which willie-f course, not take place until the burners arerelighted;

to the burnerscannotberesumed after being accidentally cut off until theattendant-is,

' ready to relight the burners,- or given an opportunity to closetlieburners.

,The preferred einb. (liinent forth in the Sp8ClfiCa-tl0n,b11i3 it willbe 'un- -(lerstood that modifications within the scope of the cla medinvention may be 'made in the construction without departing from theprinciple of'the invention or sacrificing any of its advantages.

I of the inven :tioii: is disclosed inthe drawings and set Having thusdescribed the invention what 7 is claimed as new 1s:

An automatic gas shut-off comprising a casing provided with apartitioirtolform an inlet, an outlet and a diaphragm chamber, thelatterv beingarranged over saidiin let and outlet chambers andpermanently communicating with the outlet chamber, a diaphragm securedwith said casing and extending across theydiaphragm chamber, a hollowcylindrical member secured in the upper portion of said inlet chamberand having its lower end constituting a'valve seat, a supporting elementsecured, in the top of and having its upper end' offset with respect tosaid: member, a lever =eccentricallypivoted to the upperend of saidelement and arrangedover said inlet and outlet chambers, a valve stemextending through said member and'lia-ving its upper end pivotallyconnected provided with. a valve cooperatingwith said seat toropeningand closmgsaidinlet chamber, a counter-weightsecured to tlieother end ofsaid lever, and a vertically disposed push rod-pivotally connected tosaid lever between its pivot and said seat andifurther connected to'said diapl'i 'agnrand extended from saidicasing. y l v i In testimonywhereof, we aflin ourysignw' tures hereto.

Josnrn= GQ HARRIS. enonen n JAQUETT.

- to one end of saidv leverPan'd' its lower end A simplyconstructeddevice is thus produced by means: of which the How of gas deer withrespect to saiddiaphragnrcham

